package org.xiaom.butler.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

public class SetCharacterEncodingFilter implements Filter {
	protected String encoding = null;
	public void destroy() {
		this.encoding = null;
	}

	public void init(FilterConfig filterConfig) throws ServletException
	{
		this.encoding = filterConfig.getInitParameter("encoding");
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException
	{
		request.setCharacterEncoding(encoding);
		response.setContentType("text/html;charset=" + encoding);
		response.setCharacterEncoding(encoding);
		
		HttpServletRequest hr=(HttpServletRequest) request;
		request.setAttribute("base",hr.getContextPath());
		
		chain.doFilter(request, response);
	}

}